In 20 years, Sam will be 2 times Mary's age. 20 years ago Sam was 4 times Mary's age. How old are Sam and Mary now?

What is the solution for 4x+6+3=17?

What is the greatest common factor of 18, 54 and 72?

What is 8/30 simplified

Anthony put $4,000 in a savings account with a fixed interest rate of 4.1% for three years. The interest is compounded semi-annually. How much money will be in the account after three years?

If two is subtracted from four times a certain number, the result is 18. Find the number.

The women's department of a store stocks 4 types of black socks for every 5 types of white socks. The men's department stocks 6 types of black socks for every 7 types of white socks.

Is 5y=x + (1 over 3) proportional?

50% of the population in Alaska lives within a 50-mile radius of Anchorage. If the total area of Alaska is 586,412 square miles, about what percent of the total land area is within 50 miles of Anchorage?

Evaluate 12x - (4y+7z) for x=9 y = 4 and z = 2

Which of the following expressions are equivalent to 4 - (-5) + 0?